Improvement in steam-engines



UNiTED STATES ATENT OFFICE.

IMPROV'EIVIEN' IN STEAM-ENGINES.

Specication forming part of Letters Patent No. 54,150, dated April 24,1866.

To all whom it may concern:

Be it known that 1, ANDREW HARTUPEE, of the city of Pittsburg, in thecounty of Allegheny and State of Pennsylvania, have invented a new andImproved Steam-Engine; and I do hereby declare that the following is afull and exact description thereof, which will enable others skilled inthe art to make and use the same, reference being had to theaccompanying drawings, forming part of this' Specification, in which-Figure l is a sectional view of the engine through the line a w of Fig.2, and Fig. 2 is an end view of the same.

Similarletters of referenceindicatelike parts in both igures.

The object of this invention is a steam-engine which works onthc sameprinciple as the one for which I have obtained Letters Patent datedDecember 27, 1864, and numbered 45,603, but having several improvements,which I will further specify.

A is a small cylinder, working at very high pressure, with its valve orvalves V of any construction, and its piston P and piston-rod p.

B is the moderator or receiver, in which the steam is expanded and itspressure moderated, as claimed in my patent of December 27, 1864.

C is a large cylinder', also with its valve or valves V of any desiredconstruction, and its pipe D leading to a condenser of any construction.(Not shown in the drawings.)

The piston Q of the cylinder G has two piston-rods, E E', set far enoughapart to pass out through the head F of the cylinder C in suitablestufting-boxes, and extend on each side of the small cylinder A untilthey reach the yoke or cross-piece K, to which they are keyed 'orotherwise fastened; and, as the piston-rod p ofthe cylinder A is alsokeyed or fastened to the center of the same yoke K, the two pistons Pand Q are connected together, and when acted on by steam-pressure, willboth move in thev same direction. The pistons Q and I? are so regulatedin their relation to the valves V and V that the steam will always acton the corresponding side of said pistons, so as to make them act inharmony one with the other.

The head F of the large cylinder C is so shaped as to receive the headGr, of the. small cylinder A and the head G, or both the heads G and Fare so shaped that when they are bolted together there will be leftbetween them a vacant space, H, filled with air to act as anon-conductor of heat and prevent the condensation of the steam in thesmall andlarge cylinders.

I is the steam-pipe coming from a boiler of any construction, butworking at very high pressure.

J is a valve or cock which connects the steam-pipe I with the moderatorB, through the pipe J. This valve or cock J is used for the purpose ofbleeding the boilersthat is, to blow ott' any excess of steam in theboilers when the engine is stopped or working off less steam than isgenerated in the boilers. It is also used, when desirable, to illthemoderator with steam and bring up that steam to the desired pressure forworking in the large cylin.

der until it is brought upto that pressure by the accumulation of steamexhausting from the cylinder A. A

M is a valve which is loaded with weights or acted upon by springs andworking as a safety-valve, so as to prevent any undue acculnulation ofsteam in the moderator B.

The valves V and V' have nothing novel in their construction, and anyvalve or valves or cocks will answer in their place, provided they areso combined as to admit steam on the same end of the respectivecylinderA and G at the same time, and make the pistons P and Q travel inthe same direction.

The working of the engine is substantially the same as the one I havepatented and already referred to. The high-pressure steam is admitted bythe pipe I to the small cylinder A, and it exhausts by the pipe N intothe moderator B. The large cylinder C is supplied with steam from themoderatorB through the pipe O, and exhausts by the pipeD into thecondenser, as in ordinary lo w-pressure engines, the small arrowsindicating the direction of the steam and of the pistons.

What I claim as my invention, and desire to secure by Letters Patent ofthe United States, is

l. lIhe arrangement of the two cylinders A and C, having threepiston-rods, E, E, and

1J', fastened to a, egmmon yoke or erosspiece,v K, when combined withthe receiver or moderator B. 4

2. The combination of the valve or eook J, pipe I., and pipe J with thereceiver or moderator B, as described, and for the purpose specified.

3. The arrangement of the two cylinderheads F and Gr, as speeied, so asto leave between them the space H, in the manner and for the purposespecified.

ANDREW HARTUPEE. fL.

Witnesses H. P. GENGEMBRE, I. DONALDsoN.

